What are these vacuum parts?

[Mudflapp]

Hello everyone! My name is TJ/ mudflapp, I have a 1983 c10 with a SB 350. Im installing a new manifold this weekend, Im trying to eliminate some vacuum lines in the process to clean it up a bit. There's a couple vacuum lines that I don't know what they are going into/what they even are . I took some pictures for you guys maybe you can tell me what they are, and if they can be eliminated? IN the fourth picture (with the red circle) that is right under the header manifold maybe even looks like its attached?? no idea let me know guys!!

Thanks: TJ, aka mudflap